| /* |
| * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef SHARE_GC_Z_ZLIVEMAP_HPP |
| #define SHARE_GC_Z_ZLIVEMAP_HPP |
| |
| #include "gc/z/zBitMap.hpp" |
| #include "memory/allocation.hpp" |
| |
| class ObjectClosure; |
| |
| class ZLiveMap { |
| friend class ZLiveMapTest; |
| |
| private: |
| static const size_t nsegments = 64; |
| |
| volatile uint32_t _seqnum; |
| volatile uint32_t _live_objects; |
| volatile size_t _live_bytes; |
| BitMap::bm_word_t _segment_live_bits; |
| BitMap::bm_word_t _segment_claim_bits; |
| ZBitMap _bitmap; |
| size_t _segment_shift; |
| |
| const BitMapView segment_live_bits() const; |
| const BitMapView segment_claim_bits() const; |
| |
| BitMapView segment_live_bits(); |
| BitMapView segment_claim_bits(); |
| |
| BitMap::idx_t segment_size() const; |
| |
| BitMap::idx_t segment_start(BitMap::idx_t segment) const; |
| BitMap::idx_t segment_end(BitMap::idx_t segment) const; |
| |
| bool is_segment_live(BitMap::idx_t segment) const; |
| bool set_segment_live_atomic(BitMap::idx_t segment); |
| |
| BitMap::idx_t first_live_segment() const; |
| BitMap::idx_t next_live_segment(BitMap::idx_t segment) const; |
| BitMap::idx_t index_to_segment(BitMap::idx_t index) const; |
| |
| bool claim_segment(BitMap::idx_t segment); |
| |
| void reset(size_t index); |
| void reset_segment(BitMap::idx_t segment); |
| |
| void iterate_segment(ObjectClosure* cl, BitMap::idx_t segment, uintptr_t page_start, size_t page_object_alignment_shift); |
| |
| public: |
| ZLiveMap(uint32_t size); |
| |
| void reset(); |
| void resize(uint32_t size); |
| |
| bool is_marked() const; |
| |
| uint32_t live_objects() const; |
| size_t live_bytes() const; |
| |
| bool get(size_t index) const; |
| bool set_atomic(size_t index, bool finalizable, bool& inc_live); |
| |
| void inc_live_atomic(uint32_t objects, size_t bytes); |
| |
| void iterate(ObjectClosure* cl, uintptr_t page_start, size_t page_object_alignment_shift); |
| }; |
| |
| #endif // SHARE_GC_Z_ZLIVEMAP_HPP |